I typically put them near but not in the kill hole....not too high off the water, maybe a foot or two.

The biggest complaint I have with mojo's is that they can spook ducks once they start to work. They will pull them in, but I like a manual spinner with a string bc you can stop it from spinning, and when stopped they return to dark side of wing up.

I place mine up wind of the landing zone & a few inches to a foot above the water. They should be no further than 15 yds from blind with most birds landing 5 to 10 yds behind it. If you want more than one shot. This works for me & just FYI I have had many 100 bird + seasons. I have tried many times when birds were not coming in, taking it out of water & not using it & the results were the same some ducks just get blind shy. Good Hunting.